Watch the Oscars musical performances again ... and again, and again -- VIDEO

Even if you didn’t know that music in film was the theme of this year’s Academy Awards, you had to notice the abundance of musical numbers. Nominees (Adele), past winners (Jennifer Hudson, Catherine Zeta-Jones), icons (Barbra Streisand), and even host Seth MacFarlane all took center stage to belt out a classic tune. You can catch them all, plus more, on ABC’s Oscar blog or click through for highlights, like Adele singing ‘Skyfall,’ which took home the Oscar for Best Song last night.